package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登陆
      * @param userLoginDTO
     * @return
     */
   public User wxLogin(UserLoginDTO userLoginDTO){
      String openid = getOpenid(userLoginDTO.getCode());
       //判断openid是否为空，如果为空表示登陆失败
       if(openid == null){
           throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
       }
       //判断当前用户是否为新用户
      User user = userMapper.getByOpenId(openid);
       //如果是新用户自动完成注册
       if(user == null){
        user =   User.builder()
                 .openid(openid)
                 .createTime(LocalDateTime.now())
                 .build();
          userMapper.insert(user);
       }
      //返回这个用户对象


       return user;
   }

    /**
     * 调用微信接口服务
     * @param code
     * @return
     */

   private String getOpenid(String code){
       //调用微信接口服务，获得当前微信用户的openid
       Map<String,String> map = new HashMap<>();
       map.put("appid",weChatProperties.getAppid());
       map.put("secret",weChatProperties.getSecret());
       map.put("js_code",code);
       map.put("grant_type","authorization_code");
       String json = HttpClientUtil.doGet(WX_LOGIN,map);

       JSONObject jsonObject = JSON.parseObject(json);
       String openid = jsonObject.getString("openid");
       return openid;

   }
}
